Reeling device for information carrier film

ABSTRACT

A film cartridge comprising two winding drums is attachable to a reeling device selectively in a normal position, a side-for-side inverted position, an end-for-end inverted position and in a side-for-side, end-for-end inverted position. In any selected attached position of the cartridge the winding drums are drivingly connected to drive assemblies of the reeling device by coupling means. The drive assemblies and the coupling means are such that one of the winding drums can be rotated by the respective drive assembly in a first direction and the other winding drum can be rotated by the other drive assembly only in a direction opposite to said first direction.

Unite States Patent [191' [111 3,841,579 Wingerter 1 Oct. 15, 1974 [54] REELING DEVICE FOR INFORMATION CARRIER FILM [75] Inventor: Franz Wingerter, Berlin, Germany [73] Assignee: Beethold Fototype GmbH,

Munich, Germany [22] Filed: Apr. 9, 1973 [21] Appl. No.: 349,103

[30] Foreign Application Priority Data Apr. 17, 1972 Germany 2218490 [52] US. Cl. 242/67.4, 242/7l.2 [51] Int. Cl B65h 17/02 [58] Field of Search 242/67.4, 71.2, 197, 200

[56] References Cited UNITED STATES PATENTS 2,517,055 8/1950 Thompson .1 242/67.4 2,159,727 5/1939 Markley 292/674 3,398,912 8/1968 Waggeland 242/71.2 3,459,390 8/1969 Hugel 242/200 3,523,657 8/1970 Hearon 242/62.4 X

FOREIGN PATENTS OR APPLICATIONS 1,088,454 3/1958 Germany 242/67.4

Primary ExaminerDonald E. Watkins Assistant Examiner-Edward J. McCarthy Attorney, Agent, or Firm-James E. Nilles [57] ABSTRACT A film cartridge comprising two winding drums is attachable to a reeling device selectively in a normal position, a side-for-side inverted position, an end-for-end inverted position and in a side-for-side, end'for-end inverted position. In any selected attached position of the cartridge the winding drums are drivingly connected to drive assemblies of the reeling device by coupling means. The drive assemblies and the coupling means are such that one of the winding drums can be rotated by the respective drive assembly in a first direction and the other winding drum can be rotated by the other drive assembly only in a direction opposite to said first direction.

12 Claims, 8 Drawing Figures PAIENTEUBU 2 5m: 3,841.579

sum 1 or a Pmmm w 3.841.579

SHEETEOFd Fig.2

Fig.

. stopping and rewinding a flexible information carrier or film suchas isused in'photographic'type setting'mw chines or in apparatus of a similar nature.

The invention is concernedmore particularly with the problem'of controlling the winding, stopping and rewindingof a flexible information carrier quicklyand reliably in such a manner that a certainportion of the I carrier, that is, alspe'cific' piece or-inrormati can be .scanned and made individually, available" for subse quent use. In photographic typesetting machines',for instance, the information carrier for the various letters and other symbols to be printedfis customarily provided in the form of a spool of negative film' vvhich has-all the needed letters and symbols distributeti over its length: in order to utilize such amachine to its'fullest possible extent it is not only necessary to advance,jstop andirea verse the film quicklyand reliably; as needed,but= it should also be possible topresent the film to a scanning head, which usuallyincorporates a suitableoptical-systern, in such a manner that the information thereon will appear either in a normal upright position; or in an upside down position, or in an end forend invertedposition or in an upside down andendfor-end in'vertedposition. f f SUMMARY OPTHEilblV-ETNTIQN- The invention provides a deviceforteelingja flexible 7 without, having to engageor disengage the drivinginformation carrier back andforth" between a pair of winding drums andwhich'is operable not only-to start, stop and reverse the rotationof the drums sjoasto wind any desired, length of -thelcarrierupon-one drum or the 1 other and to hold any portion of thefcarrier' at standstill i between thedrums, but-which'is also-operable to pres: ent the information of the carrier selectively in'either a normal upright position or inan upside. down position, or in anend for end inverted pos'ition-, or-inan up sidedown and end for-end inverted pos'itionif More specifically, the"invention-provides areeling device of the aboveoutlinedcharacteti which requires no change or adjustment of thedrivingmechanisrnfor the winding drums in ordertopr'esent carrierinformation in any of the four'm'entionedpositions, t

The invention further provides areelingdcviceof the above outlined character which is mechanically simple. efficient and reliable irtopeiait-ibnaridj which maybe manufactured at relatively lowcosts;

In accordance with the invention, areeling device of the above outlined character is provided with one'driveassembly for one ofthe winding drums and withfan other drive assembly for thepther winding drum, each" drive assembly comprising apa'irof relatively. rotatable driving members connected' ln drivereversingrelation" to each other; and eaeh' having acoiiplingelementfor cooperative engagement with either ofthe windingdrums, the arrangement being'such th'atwhen one drum is coupled to one or theotherdriving memberof one drive assembly, the otheindrtimis uncoupled from the corresponding driving member of'th'e other drive assembly, andso that, conversely, when the otherdrum is coupled to one or the'other of the driving members of the other drive assembly, the one drum is uncoupled from the corresponding driving element of'theone drive assembly. I i v The winding drums and the torque transmitting ;ele'- ments areoperatively interrelated according to themvention, in such a manner that one of two drivingmemberswhich is. rotatable in a first direction, can be operai tivelyconnected with "the one winding dr umgwhile the otherof the two driving members which. is operatively effective in the" other directionlcan be connectedinan operative manner to the other winding drum On the other hand, sincethe'two' pairsjof driving'members are .each connected witha common drive shaftviaone-way clutches by means of whichfonly one pair of-the driving 1 members is driven, depen'din'gon the direction ofrota tion'ofi the common drive shaft, it follows that accord ing to the selected direction'of rotation of the common drive shaft onlyone of the winding drums is driven by the driving member, coactin'g therewith while the other drumv can turn freely, since the driving member in "co 'operativerelation therewith is separated from the common drive shaft via theassociated one-way clutch and can thus turn freely as well, if, on the, other hand, the

directionof rotation ,of the common drive shaft is re; versed, then thelother winding' drum is rotated in the other direction by its associated drivingmemberwhich is nowcoupled with the common shaft 'while, th,e-previ-' ously driven driving member can rotate freely together" with itsassociated winding drum. in this way, both forward and backward movementof the information carrieris possible in-very rapidsuc'cession solely by chang ing the direction of rotation of the, common drive shaft members with orfrom their-associated winding drums.

' In actual practice, itis particularlyadvantageous when, in accordance with a further feature of thein} ve'ntion, the winding drums can'lbe selectively can nected'wi'th-fthe two pairs of driving members prime reeling device so thatthe information 'c'arriercan be both "advanced and reversed anormal, reversed, "in? verted-reversed or inverted position by operation of the reelingidevice, without changing the windingrelation between the information carrier and thewintiing drums. According to thi's'featu're'of the invention, the oppositeends of the windingdrums are ,c'onnectable',

respectively, with the two driving memberpairs in" various positions, thereby permittingthe information car-' rier to'beadvanced and reversed in various positions of presentation to a scanning system, depending on the positioning of the winding drumrelative tothe driving members of thereelingdevice. v r g in accordance with a furtherfeature of the invention,

the winding drums and the information carrier areac commodated in a cartridge which can be positioned. on t the reeling device in four different .gpositions of attach:

ment thereto, each establishing a driving connection betweenone winding drumandone of a pair ofdriving members, and, atthesame time, establishing a driving connection between the other winding drum'and oneof the other pain of driving members. In such an assembly according tothe invention, therefore, both the position of the informationcarrier with respect to ascanning systemandthe'correct arrangement of the forward and, backward drive is determined solely by placing the, carpossible positions relative to the tridge' in one of its four reeling device.

In accordance with a preferred embodiment of invention, the reeling device comprisesapair of oppo sitely rotatable drivingmembers for one of the winding drums, another pair of oppositely rotatable driving niembers'for'th'e other winding drum, and-two bevel ge'arassemblies, one operatively associated with one of sa'id pa irs of driving member s, and the other operatively associatedwith the other of said pairs" of driving members. Each bevel'gear'as'sembly comprisesfirst and second bevel gears connected," respectively, to the associated drum driving members, and a third bevel gearin mesh with the first and second bevel gearsfAlternately engageable clutches connect the third bevel'gears, respectively, with a common, reversibly rotatable drive shaft. By transmitting drivingtorque in this manner from a third bevel gear to first and'second bevel gears which are in mesh therewith, rotation of the first and second bevel gears in opposite directions is achievedso that these merely need to be connected with the two driving members of a driving pair in a suitable manner to ensure that thesetwo driving members will also rotate in the respective opposite directions.

This is achieved in accordance with the invention, for example, in that the one respective driving member'lis a first disc provided with a pin, said disc having ace'n'f tral recess which receives a second disc designed ast he other driving member and also provided with a pin and in that the second disc is connected via a shaft to the second bevel gear which passes through a hollow shaft connecting the first disc with the first bevel gear.

The connection between the winding drums and-the respectively associated pairs of driving members of the reeling device is achieved in accordance with a further feature of the invention by providing each winding drum at one end with a radially outer coupling recess and with a radially inner idling recess, and at its other end with a radially outer idling recess and with a radially inner coupling recess, so that positioning of the winding drums on the reeling device in end for end inverted relation to each other'will connect the radially outer coupling recess and the radially inner idling recess of onedrum in driving and non-driving relation, respectively, with one-pair'of said driving members, and-so that at the same time the radially inner coupling recess and the radially outer idling recess of the other drum, will be connected in driving and non-driving relation, respectively, with the other pair of driving mem bers.

With the aid of this very simple mechanical construction, the exactly correct relationship between the driving members of the reeling device and the film winding drums is achieved by merely placing the drums together with the cartridge into an operative position on the discs or pins of the driving members.

According to a further feature ofthe invention, the common drive shaft is connected with the third bevel gears via one-wayclutches at the opposite ends thereof, the clutchesacting in opposite directions of rotation. This clutch arrangement ensures th'at, depending on the direction of rotation of the common drive shaft, only one of the two'pairs'iof driving members will be driven and 'the other pair of drivingmembers can turn freely relative to each otherand relative to the common drive shaft.

In a preferred embodiment of the invention, the oneway clutches are of the wrap-around drag springtype. These wrap-around spring type clutches each 'comprises, in accordance with a further feature of the invention. a coil spring mounted on the shaft with pre- 4 bias,'ofie e'ndi'df said spring engaging positively a sleeve surrounding said shaft, and brake springs are provided with exert a force on at least one part of the outer peripheral surface of said sleeve and whose braking torque is greater than the torques of the bearing friction and the lifting torque of the coil spring.

A very rapid transport movement of the information carrier is'possible both in a forward as well as in a reverse direction with the aid of these one-way clutches of relatively simple design and with the aid of the brake springs acting on the sleeves; moreover, the informationcar rier can be stopped between both movements at any desired place in a reliable and positively controlled manner.

DRAWINGS The invention will now be more fully explained with reference to the embodiment illustrated in the draws.,.i 'vhih FllGl xl' shows schematically an information carrier filmin normal position presenting a series of characters thereon in an upright position; e

FIG. 2 shows thefinformation carrier film in a position presenting the series of. characters in an upside down, end forend inverted position,v

."FIG. 3 shows the information carrier film in a position presenting the series of characters in an upside down position; I

FlG. 4 shows "the information carrier film in a position presenting the series of characters in an end for end inverted position;

FlG. Sis a sectional view of a reeling device for a film cartridge shown in FIGS. 7 and 8;

FlG..6'is'a schematic end view of a one-way clutch incorporated in the device shown in FIG. 5;

FIG. 7 is a sectional elevation of a film cartridge for use with the reeling device shown in FIG. 5; and

FlG. 8shows the cartridge of FIG. 7 in an elevation of the front ends of the winding drums.

DETAILED DESCRIPTION ln FlGS.'l to 4, the possibilities of driving an information carrier with the winding drums 32 and 33 is schematically illsutrated; according to whether movement of the information carrier 100 toward the left or right end of the figure is desired, the winding drums 32 and 33 must not only be rotated in one direction or the other, but also one winding drum must be driven while the other winding drum turns freely and vice-versa. There is a total of four different basic functions of each winding drum for the different positions of the information carrier illustrated in FIGS. 1 to 4 and its transport directions, namely: for each driving side cooperating, driven clockwise, freely turning clockwise, driven anticlockwise and freely turning anticlockwise.

These four basic functions may be performed in a very simple constructional manner by means of the driving system incorporating the invention as illustrated in FIG. 5 and the correspondingly designed winding drums.

There is provided in FIG. 5 a common drive shaft 1 which is rotatable in opposite directions by means not illustrated here in detail, and which may be motor driven or manually operated. The drive shaft 1 is connected with bevel gears 4 and 5 via one-way clutches 2 and 3, respectively, which operate to transmit torque in relatively opposite directions. The bevel gear 4 meshes with companion bevel gears 6 and 8 which are disposed coaxially at right angles to the axis of the bevel gear 4, and the bevel gear 5 similarly meshes with companion bevel gears 7 and 9. Bevelgears 6 and 7 are journaled in a manner which is only schematically indicated in the drawing and are connected with first discs 12 and 13 via hollow shafts 10 and 11. Discs 12 and 13 have coupling pins 14 and 15, respectively, extending perpendicularly to the disc surface, as well as central recesses 16 and 17, respectively, in which other discs 18 and 19 are rotatably journaled in a manner not illustrated in detail] The discs 18 and 19 are provided with pins 20 and 21, respectively, which extend perpendicularly to the disc surface and are connected with the lower bevel gears 8 and 9, respectively, via shafts 22 and 23 which pass through thehollow shafts l0 and 11 and are rotatably journaled relative thereto; the shafts 22 and 23 are also journaled in a manner which not illustrated in the drawings in detail.

The one-way clutches 2 and 3 have the'same construction in principle, the clutch 2 however transmitting torque of the drive shaft 1 to the bevel gear 4 only in one direction and the clutch 3 transmitting torque of the drive shaft 1 to the bevel gear 5 only in the other direction. The bevel gears 4 and 5 are spearated from the common shaft 1 similar to a free-wheeling arrangement for the opposite directions of rotation. The structure and mode of operation of the one-way clutches is explained hereinafter only with reference to the clutch 2, since the clutch 3 has the same structure in principle. There is mounted on a member 24 of the common shaft 1 as well as on a shaft member 25 of the bevel gear'4 in clearance fit a wrap around drag spring 26 which is covered by a sleeve 27 which surrounds the spring 26, the common shaft 1 and the'shaft member 25 of bevel gear 4. Brake springs 28 and 29 act on one portion .of the outer surface of the'sleeve 27 as canbe seen in FIG. 6..lt can also be seen in FIG. 6 that one endv 30 of the spring 26 is secured in a recess 31 ofthe sleeve 27. I

The operation of such a wrap-around spring coupling is as follows. When the wrap-around spring coupling is acted upon in its direction of free rotation, the sleeve 27 is held fast by the brake springs 28-and 29 so that the spring is raised both-from the shaft 1 and from the shaft member 25 of the bevel gear 4 when the common shaft 1 rotates contrary to the sense of winding of the tension spring thereby permitting free and almost frictionless relative movement between the bevel gear 4 and shaft 1. If the drive shaft 1 rotates in the sense of winding of the spring, however, the spring is contracted and is pressed against the shaft extension and shaft.

member 25 of bevel gear 4 while at the same time causing the sleeve 27 to rotate so that the bevel gear'4 is connected with the drive shaft 1 in a manner practically free of slip.

In the case of a first direction of rotation of the drive shaft 1, thetorque of the drive shaft 1 isthus transferred via the bevel gear 4 to the bevel gears 6 and 8 which rotate in relatively opposite directions by virtue of their geometrical arrangement relative to the bevel gear 4. Since the discs 12 and 18 are rigidly connected with the associated bevel gears 6 and 8, discs 12 and 18 also rotate in relatively opposite directions. While torque is being transmitted to bevel gear 4, bevel gear 5 is simultaneously uncoupled from the drive shaft 1 so that bevel gears 7 and 9 are not driven and can thus turn freely in relatively opposite directions due to the free-wheeling effect of the clutches. Torque applied by discs 13 and 19 to the associated bevel gears 7 and 9 can thus be absorbed without impediment due to the free rotation of bevel gear 5.

A cartridge 34 supporting winding drums 32 and 33 is schematically illustrated in FIGS. 7 and 8 without the information carrier which is also disposed in the cartridge and which can be wound back and forth between winding drums 32 and 33. At its axial front end, the winding drum 3 2 has an annular recess 36 in which the coupling pin 14 can freely circulate when the cartridge 34 is placed in its FIG. 7 position on the reeling discs shown in FIG. 5. Winding drum 32 also has at its axial front end recesses 38 which are designed in the shape of bores distributed over an inner pitch circle and which can be positively engaged by coupling pin 20 of disc '18 when the cartridge 34 is placed in its FIG. 7 position on the reeling device shown in FIG. 5. At its axial rear end, winding drum 32 has bores 40 lying on a first larger pitch circle, which are positively engageable by coupling pin 14 of disc 12 when the cartridge 34 is inve'rted side for side from its FIG. 7 position. In addition, the rear end of the winding drum 32 also has a circular recess 42 within which pin 20 of disc 18 can turn freely when the cartridge 34 is inverted side for side from its F IG. 7 position. 7

Similarly, the axial rear end of the winding drum 33 is provided with an annular recess 37 for free turning of coupling pin 15 therein, and with bores 39 for positive engagement of coupling pin 21 when the cartridge is inverted-side for sidefrom its FIG. 7 position atits front end the winding drum 33 has bores 41 for positive engagement with coupling'pin l5, and a circular recess 43 for free turning of pin 21 when the cartridge is placedin itsFIG. 7 positiononthe reeling device of FIG. 5.-The winding drums 32 and33 are disposed in the cartridge 34 so that heterologo'us'en'ds of the winding drums which have differing designs with respect to the bores i and I recesses are disposed at the opposite sides of the cartridge and the latter can be positioned on the reeling device shown in FIG. 5 either in the FIG. 7 position,orIin'its side for side inverted position, or in its end foren'd inverted position, or in its side for side and end for end inverted position.

It can be easily seenthatwhen positioning the cartridge 34 in its FIG. 7 position on the reeling device shown in FIG. 5, the coupling pin 20 connected to disc 18 engages positively in a bore 38 while coupling pin 14 of disc 12 is capable of circulatingfreely in recess 36. At the same time, coupling pin 15 is positively connected with winding drum 33 while coupling pin 21 can turn freely in recess 43 when the cartridge 34 is connected in its FIG. 7 position with the device shown in FIG. 5. According to the directions of rotation (explained with reference to FIG. 5) of the driving members which are designed as discs 12 and 18, winding drum 32 is rotated in a first direction by means of coupling pin 20 and bevel gear 8 when clutch 2 takes effect while the driving member represented by disc 12 and turning. in .the opposite direction does not affect the winding drum 32. Since bevel gears 5, 7 and 9 areseparated from drive shaft 1 via clutch 3 when the device in accordance with the invention is operated in the assumed way, it is possible for the driving member 13 which is operatively connected with the winding drum 33 by the coupling pin 15 to rotate freely so that winding drum 33 is capable of rotating freely in the same direction in which the winding drum 32 is driven. If the direction of rotation of the drive shaft 1 is reversed, however, the winding drum 33 is rotated in the other direction by the driving member 13 which is coupled to this winding drum by the couplingpin 15; at the same time, bevel .gea rs 4, 6'and 8 are released through clutch '2 so that the driving member 18 which is positively conwithout inverting the cartridge end for end from its FIG. 7 position.

Since the cartridge 34, however, can be positioned on the device shown in FIG. not'only with one or the other'of its sides directed toward the driving members of the reeling device, but can also have its ends inverted by turning it about its axis of symmetry which lies parallel to the axes of rotation of the winding drums, the four various basic functions which were discussed hereinbefore can also be easily performed with the drive means illustrated in FIG. 5. v

If the braking torque of the brake'springs 28 and 29 acting onthe sleeve 27 is greater than the torques of the bearing friction as well as of the lifting torque of the drag spring 26, then an immediate reversal of the direction of transport of the information carrier is also possible when the direction of rotation of the drive shaft 1 is reversed, that is, an immediate stoppage of the information carrier occurs when the drive shaft 1 is stopped.

' vlnsummary, the herein disclosed film cartridge has a pair of rotatable film winding drums 32,33 at a fixed center spacing from each other, each drum being provided with torque transmitting coupling means at its opposite ends as shown at 38 and 40 for the drum.32, and at 39 and 41 for the drum 33. The herein disclosed reeling device comprises a pair of rotary'drive assemblies 12, 18 and l3, 17 at the same center spacing from each other as the winding drums, the drive aasemblie's being detachably connectable with the coupling means of the winding drums. A pair of one-way clutches 2 and 3 are operatively interposed between a reversibly rotatable drive shaft 1 and the drive assemblies so that rotation of the drive shaft in one direction will be transmitted through one of the clutches to one of the drive assemblies, and so that rotation of the drive shaft in the opposite direction will be transmitted through the other clutch to the other drive assembly.

I claim:

1. The combination of a film cartridge having a pair of rotatable film winding drums at a fixed center spacing from each other; and a reeling device cooperable with said winding drums so as to wind a length of film back and forth therebetween; said winding drums each having torque transmitting coupling means at its opposite ends, and said reeling device comprising, a pair of rotary drive assemblies at the same center spacing from each other as said winding drums and detachablyconnectable, respectively, with said coupling means of said winding drums the'winding drums can be rotated by the respective drive assembly only in a first direction and the other winding drum can be rotated by the other drive assembly only in a direction opposite to said first, a reversibly rotatable drive shaft, and a pair of one-way clutches operatively interposed between said drive shaft and saiddrive assemblies so that rotation of said drive shaft in one direction will be transmitted through one of said clutches to one of said drive assemblies and so that'rotation of said drive shaft in the opposite direction will be transmitted through the other of said clutches to the other of said drive assemblies.

2. The combination of a film cartridge having a pair of rotatable film winding drums; and a reeling device cooperable with said winding drums so as to wind a length of film back and forth therebetween;'said winding drums each having torque transmitting coupling means at its opposite ends, and said reeling device comprising, a first'pair of driving members. interconnected for relative rotation in opposite directions and each having a coupling element releasably connectable with said coupling means of said winding drums; a second pair of driving members interconnected for relative rotation in opposite directions and each having a coupling element detachably connectable with said coupling means of said winding drums; a reversibly rotatable drive shaft; and a pair of one-way clutches operatively interposed between said drive shaft and said first and second pairs of driving members so that rotation of said drive shaft in one direction will be transmitted through one of said clutches to said first pair of driving members, and so that rotation of said drive shaft in the opposite direction will be transmitted through the other of said clutches to said second pair of driving members.

3. The combination set forth in claim 2 wherein the coupling elements of said first and second pairs of driving members-are connectable with the coupling means of said winding drums in'such a manner that one of the ing members rotating in said other direction, while the coupling element of the first pair of driving members which rotates in the other direction will be free to rotate idly relative to said one winding drum and the coupling element of said second pair of driving members which rotates in the opposite direction will be free to rotate idly relative to said second winding drum.

4. The combination of a film cartridge having a pair of rotatable film winding drums; and a reeling device cooperable with said winding drums so as to wind a length of film back and forth therebetween; said winding drums each having torque transmitting coupling means at its opposite ends, and said reeling device comprising, a reversibly rotatable drive shaft, first and second bevel gears axially aligned with said drive shaft for relative rotation independently thereof; a pair of oneway clutches operatively interposed between said drive shaft and said bevel gears so that rotation of said drive shaft in one direction will be transmitted to said first bevel gear through one of said clutches and so that rotation of said drive shaft in the opposite direction will be transmitted to said second bevel gear through the other of said clutches; a first pair of companion bevelgears in mesh with said first bevel gear; a first pair of drive members non-rotatably connected, respectively,

with said first pair of companion bevel gears; and each having a coupling element detachably connectable with said coupling means of said winding drum; and a second pair of drive members non-rotatably connected, respectively, with said second pair of companion bevel gears and each having a coupling element detachably connectable with said coupling means of said winding drums.

5. The combination set forth in claim 4 and further comprising brake means operatively associated with said one-way clutches so that rotation of said winding drums will be instantly arrested when transmission of torque thereto from said driving shaft is interrupted.

6. A reeling device for film winding drums comprising a reversibly rotatable drive shaft; a first pair of concentrically rotatable driving discs interconnected for relative rotation in opposite directions; radially outer and radially inner coupling elements secured, respectively, to said first pair of driving discs for rotation therewith; a second pair of concentrically rotatable driving discs interconnected for relative rotation in opposite directions; radially outer and radially inner coupling elements secured, respectively, to said second pair of driving discs; and a pair of one-way clutches operatively interposed between said drive shaft and said first and second pairs of driving discs so that rotation of said drive shaft in one direction will be transmitted through one of said clutches to said first pair of driving discs, and so that rotation of said drive shaft in the opposite direction will be transmitted through the other clutch to said second pair of driving discs.

7. A reeling device as set forth in claim 6, wherein said one-way clutches are of the wrap-around drag spring type.

8. A film cartridge comprising a casing and a pair of film winding drums rotatably mounted in said casing in parallel transversely spaced relation to each other, each of said drums having at one ot its axially opposite ends a central coupling hub and annular channel surrounding said hub; and at its other end, a central recess and a coupling flange surrounding said recess; the coupling hub and channel of one drum, and the central recess and coupling flange of the other drum facing one of the relatively opposite sides of said cartridge; and the central recess and coupling flange of said one drum, and the coupling hub and channel of said other drum facing the other of the relatively opposite cartridge sides.

9. A film cartridge as set forth in claim 8 wherein the coupling hub and the coupling flange of each winding drum have axial coupling pin receiving bores.

10. A film "cartidge as set forth in claim 9 wherein axial bores of said coupling hub at one end of each of said winding drums are located in axially registering relation to said central recess at the other end thereof.

1]. A film cartridge as set forth in claim 9 wherein axial bores of said coupling flange at one end of each of said winding drums are located in axially registering relation with said annular channel at the other end thereof.

12. A film cartridge as set forth in claim 9 wherein axial bores of said coupling hub at one end of each of said winding drums are located in axially registering relation with said central recess at the other end thereof; and wherein axial bores of said coupling flange at said other end of each of said winding drums are located in axially registering relation with said annular channel at said one end thereof. 

1. The combination of a film cartridge having a pair of rotatable film winding drums at a fixed center spacing from each other; and a reeling device cooperable with said winding drums so as to wind a length of film back and forth therebetween; said winding drums each having torque transmitting coupling means at its opposite ends, and said reeling device comprising, a pair of rotary drive assemblies at the same center spacing from each other as said winding drums and detachably connectable, respectively, with said coupling means of said winding drums the winding drums can be rotated by the respective drive assembly only in a first direction and the other winding drum can be rotated by the other drive assembly only in a direction opposite to said first, a reversibly rotatable drive shaft, and a pair of one-way clutches operatively interposed between said drive shaft and said drive assemblies so that rotation of said drive shaft in one direction will be transmitted through one of said clutches to one of said drive assemblies and so that rotation of said drive shaft in the opposite direction will be transmitted through the other of said clutches to the other of said drive assemblies.
 2. The combination of a film cartridge having a pair of rotatable film winding drums; and a reeling device cooperable with said winding drums so as to wind a length of film back and forth therebetween; said winding drums each having torque transmitting coupling means at its opposite ends, and said reeling device comprising, a first pair of driving members interconnected for relative rotation in opposite directions and each having a coupling element releasably connectable with said coupling means of said winding drums; a second pair of driving members interconnected for relative rotation in opposite directions and each having a coupling element detachably connectable with said coupling means of said winding drums; a reversibly rotatable drive shaft; and a pair of one-way clutches operatively interposed between said drive shaft and said first and second pairs of driving members so that rotation of said drive shaft in one direction will be transmitted through one of said clutches to said first pair of driving members, and so that rotation of said drive shaft in the opposite direction will be transmitted through the other of said clutches to said second pair of driving members.
 3. The combination set forth in claim 2 wherein the coupling elements of said first and second pairs of driving members are connectable with the coupling means of said winding drums in such a manner that one of the winding drums will be rotatable in one direction only by the coupling element of the first pair of driving members rotating in said one direction, and the other winding drum will be rotatable in the opposite direction only by the coupling element of the second pair of driving members rotating in said other direction, while the coupling element of the first pair of driving members which rotates in the other direction will be free to rotate idly relative to said one winding drum and the coupling element of said second pair of driving members which rotates in the opposite direction will be free to rotate idly relative to said second winding drum.
 4. The combination of a film cartridge having a Pair of rotatable film winding drums; and a reeling device cooperable with said winding drums so as to wind a length of film back and forth therebetween; said winding drums each having torque transmitting coupling means at its opposite ends, and said reeling device comprising, a reversibly rotatable drive shaft, first and second bevel gears axially aligned with said drive shaft for relative rotation independently thereof; a pair of one-way clutches operatively interposed between said drive shaft and said bevel gears so that rotation of said drive shaft in one direction will be transmitted to said first bevel gear through one of said clutches and so that rotation of said drive shaft in the opposite direction will be transmitted to said second bevel gear through the other of said clutches; a first pair of companion bevel gears in mesh with said first bevel gear; a first pair of drive members non-rotatably connected, respectively, with said first pair of companion bevel gears; and each having a coupling element detachably connectable with said coupling means of said winding drum; and a second pair of drive members non-rotatably connected, respectively, with said second pair of companion bevel gears and each having a coupling element detachably connectable with said coupling means of said winding drums.
 5. The combination set forth in claim 4 and further comprising brake means operatively associated with said one-way clutches so that rotation of said winding drums will be instantly arrested when transmission of torque thereto from said driving shaft is interrupted.
 6. A reeling device for film winding drums comprising a reversibly rotatable drive shaft; a first pair of concentrically rotatable driving discs interconnected for relative rotation in opposite directions; radially outer and radially inner coupling elements secured, respectively, to said first pair of driving discs for rotation therewith; a second pair of concentrically rotatable driving discs interconnected for relative rotation in opposite directions; radially outer and radially inner coupling elements secured, respectively, to said second pair of driving discs; and a pair of one-way clutches operatively interposed between said drive shaft and said first and second pairs of driving discs so that rotation of said drive shaft in one direction will be transmitted through one of said clutches to said first pair of driving discs, and so that rotation of said drive shaft in the opposite direction will be transmitted through the other clutch to said second pair of driving discs.
 7. A reeling device as set forth in claim 6, wherein said one-way clutches are of the wrap-around drag spring type.
 8. A film cartridge comprising a casing and a pair of film winding drums rotatably mounted in said casing in parallel transversely spaced relation to each other, each of said drums having at one ot its axially opposite ends a central coupling hub and annular channel surrounding said hub; and at its other end, a central recess and a coupling flange surrounding said recess; the coupling hub and channel of one drum, and the central recess and coupling flange of the other drum facing one of the relatively opposite sides of said cartridge; and the central recess and coupling flange of said one drum, and the coupling hub and channel of said other drum facing the other of the relatively opposite cartridge sides.
 9. A film cartridge as set forth in claim 8 wherein the coupling hub and the coupling flange of each winding drum have axial coupling pin receiving bores.
 10. A film cartidge as set forth in claim 9 wherein axial bores of said coupling hub at one end of each of said winding drums are located in axially registering relation to said central recess at the other end thereof.
 11. A film cartridge as set forth in claim 9 wherein axial bores of said coupling flange at one end of each of said winding drums are located in axially registering relation with said annular channel at the other end thereof.
 12. A film cartriDge as set forth in claim 9 wherein axial bores of said coupling hub at one end of each of said winding drums are located in axially registering relation with said central recess at the other end thereof; and wherein axial bores of said coupling flange at said other end of each of said winding drums are located in axially registering relation with said annular channel at said one end thereof. 